Hepatitis treatment and suicide risk

[Pam]

I work at a mental health center.  One of the people I work with has Hepatitis C.  He also has had ongoing depression without any suicidal thoughts.  His gastroenterologist believes he would probably benefit from treatment with interferon plus ribavirin, but is hesitant to do so because of the increased risk of suicide with these drugs.  My question is, how can one weigh the two issues.  If the Hepatitis C is left untreated this will adversely affect his health, but if treatment is initiated, there is a higher risk of suicide.  Do you have any data or studies as to the rate of suicide or suicide attempts of people receiving interferon and ribavirin for their Hepatitis C?  His depression has not been well controlled despite numerous medication trials.
Thank you, Pam